I think he is trying to find a consumer market. But like it has been stated before, why stock a bunch of hoses not knowing what you may need, if you can go to your local Napa store and have it made. Sure that single hose might be more expensive, but still cheaper than stocking a bunch of hoses you won't need. The only way I think this can be justified is if you have a machine or machines that has the same hose fail on a regular basis, like certain implement hoses.
I wish I could be more help to him, but I have had my own Weatherhead machine, hose, and fittings, for the last 10 years and buy them at wholesale. So I can custom make hoses with 2-wire hose for slightly more than they sell their hoses for.
Brian